Fire-extinguisher.



Patented June 20, 1916.

G. T. PEARSONS.

FIRE EXTINGUISHER.

APPLICATION FILED SEPT-22,1915.

o New 3K fL 6:515; latent Patented June 20,1916.

e rels qfse ia No; 51,92s

Vb ir 3 of "suitable shape, preferably cylina demons; fldrijezi lffor a fire extinguishmg liquid having alldischarge outlet 5 and. a filler opening and ldsedfby e; plug 4, said plug-being con:

ucted lyvi'than lnwardly opening and out- 'rdlyjelosedvalve to permit entrance of i to] the reservoir to displace the liquid as 'eiec dwt e w -f I Mhunted.in theqreservoir is a pist'oh chem ber br cylinderfi havinga discharge ,ontlet Tai; pie endlinline v iththe Outlet 5.in the reserv qir and i'nlets 8fand 9 with inwardly opening and outwardly closing check valves [87,9 ad jeeeni; oppcsi jte'endsstb connect the:

y lindeiytcthe reservoir. The cylinder ex 7 l tends from L the end of the reservoir opposite the hlitlet'fi and tofa point adjacent such 'outlet lfhewoutlet 7 c0 municates with a ELIITI bG iKlI COIIHGCtGCl tO t heend of the "cyl- 1nde lr, fandtlhe Walls of which chamber pref 75 "erd bly jcenvergeptcwardthe butletfi of the rse cir and to which cutletit is connected. 'Ihi hginber isin thenature of a compresconstitute an exten- (1 inflabl lt ihent 22 fi-Xed to the tube to 95 hereby control the opening and closing of h Y18 and; 19 to alternately 'c nnect itlrthecyjlinderet opposite sides h pistcnfaj; lthexccmmencement of each d ard shrokeof the piston; 4 10p 1 e mdv ed couthe rear due to the engagement e sa ldj gleee clesingthe' ports 18 and unering"the qrlss 19. 5 During'lthis movef the onliquida will bednawn from reser ufi intm l the ipiston-Q chamber I? e-inlep 8 in frontlof the piston lle Sign lthje eyl inder 6. ,Atubel2 slidzibly 0 ofbhe-abubmeni; QQ-With the'piston sleeve 21, 105

h .r h v r while the air at the back ofthe piston win;

be ejected through the tube ports 19 umcovered by' the piston sleeve and through the tube 12 and discharge outlet 5.- As soon as the piston rod is moved forward said rod .and the tube 12 will move independently of the piston head and 'until the sleeve engages with the abutment 15 thereby uncover- .ing the tube ports 18 and covering ports 19 and upon further forward movement ofthe -rod the piston will move with it sucking'in liquid from the reservoir through inlet 9 to the back of the piston, the liquid previously drawn intothe piston chamber in front of the piston now being forced and ejected vthrough the uncovered tube ports 18 into the chamber 11 and out through the dis-- charge ,outlet 5. As the liquid is drawn from the reservoir it' is displaced by air: entering through the valved port in the plug a for thefiller opening. To seal the tube 12 in the outlet of the piston chamber a stuffing box 23 maybe provided. The diameter of a e i the tube .12 is relatively large as compared with the'area of the dischargeoutlet 5, and

as the liquid enters into the 'cliamber -11 I the outlet 5 the pressure, of the liquid 1 in said membcr will be greatly increased and thereby the liquid forcibly ejectedfronrthe i the cvlinder. To )ermitof thedrawin of l w i I) through the tube due to the. restriction'of outlet. This operation will be repeated un-. til all of'the liquid is exhausted from the reservoir; i i

The piston chamber is preferably so located that it will be at one side of the center of the reservoir and lie adjacent the side, and which may constitute the top of i .the liquid from the lowermost part ofthe n and opposite ends of the reservoir.

valved inlets 8 and 9 are preferably in the' ends 26' and 27 of cylinder as shown. The" cylinder, end 27 has aserew threadedpro-. jection to extend'through an opening inthe reservoir "1 providea tube 23 extending longitlulinally of and with its ends adjacent the ends and sides of the reservoir.. This jtubc is connected by a branch tube Q-t with atube25 connected at its endsto the inlets to the pistonclulmbers to oscillate or swing on an axis longitlulinally of the reservoir. The connection of the tube'25 with'the'in lets 8 andf9'is such "that the a.\"is of rotation of the tube will be centrally ot' the reservoir; andthe tube23 connected thereto so that the endsthereof will lie adjacent the side reservoir to which is connected a clamping nutflS tosecure said end of the cylinderlni place. The said pro ecting po'rtlon has a threadedrecess for the engagement of packing 27 and held therein by anut28"through which the rod 14 passes to ing box tor-the piston red. I

To prevent sucking of air through'the ends of constitute a stilli- The tubeflti should the reservoir loo-partially valve seats are so constructed and the balls are of such size that when the syringe is held in a horizontal position the {suction will notfldraw, the balls to their seats, nor will the suction when the syringe is held in a position inclined tothe'horizontal draw thefball;at the lower end of the tube'to its" seat, but the ball at the upper end will seat itself by gravity. It is contemplated that in use the syringe will beheld ni'position with the piston chamber at the gtop, but it will be'obvious that should the syringebe held in any other position the'inlet tube 23 will assume a position in the liquid in the tube'is made of such length that when one against endwi'se movement lars 31' on'said tube. 4 To prevent leakage of the liquid from the tube 12' and the discharge outlet 5,i as well by releasable colas evaporation. ofhthe liquid, when the syringe is not in use and suspended in a position with the outlet'5 at-the bottomq'the abutment-22 is constructed in the form of such-size as to 'closetthe, inlet 8-whenthe piston is in its lowermost, position-,3 th

flange 32 engaging in an annular recess 33 i'n'the cylinder end26 thus precludingiany possibility of leakage. Should any liquid enter through the inlet!) to the back of-the lowermost part of, the .reservoir. ;To con nect the tube 25'withthe inlets .8 and!) the end is inserted into the angular portion of one of the inlets the other end will clear the I other inlet and may be inserted thereinto by a longitudinalmovement, the tube being-held e pdisk havinga flange This disk is of piston the" liquid will be prevented *[from entering said tube as t-he tube :ports'19 will beclosed by the piston sleeve. Topermit handgrip saidlhamlgrip has pins 3st projecting laterally and a portion is adapted to engagev in the recess of'the projecting portion of the cylinder end which isprovided with cani slots with which the pins engaged When itis desired to use the syringe and release the piston rod itis only-necessary to give therod a slight rotary movement as will beobvitais. To limit the movement of thepiston. and rod"an abutment 36 is fixed to-the piston rodto limit the movement in one direction by engaging with the cylinder e'1'1d27 and limited-in the opposite direction by the abutment 22(engaging with the "cylinder end 26. w v a my invention '1 Having thus described claim:

1.111 a syringe, thecombination of a-reservoirihaving .an outlet-fa cylinder therein a of the suspending of the syringe by the.

ciprocable 1n the cylind cylinder with the outlet; the inner end of said tubehavingspaced apart lateral ports;

;' piston.

i 8. In a syringe, the comb incler having a discharge outlet :at one end;

alrpiston chamber iconnectedwto the outlet at I one end; a piston; n pistonrod to extend to i the exterior ofithe p ston chamber and cylinder oppositeto the outlet; said piston chamber, piston and piston rod being catedfat one side of the longitudinalcenter of the cylinder; and a suction inlet to the purposespecified,

the piston and tube and cause the sleeve to \deylinder opposite to thetube to reciprocate cover vand =uncover nthe tube ports to alter- 2t cylinder; therein rt's en ds; a tube reer to; connect" the a piston reciproeable yin the cylinder with :the :tub'efland: having :a limited to I and fro movement on the/tube tocontrolthe open- Jing and' closing: of the v ports to a alternately connect said tube withthe cylinder on oppo site s des of the piston a rod exteridingto the enteriorof the cylinder end reservoir oppos te} the outlet to reciprocate the piston n'd tube, "substantially as for the purising a reservoir hav- 7. *A; syringe} compr 3 ing-a dischargeoutlet; a; cylinder having suetioniginlets and an outlet at oheendgralpistonmecibrocable in the-cylinder; a tUbBIIG- r cipt'oceble withthe piston atznll tithes communicating at one end with thedischarge outlet fond havinggorts controlled by the piston to alterna tely connect the tube with yfthflhylinder at opposite :ends of the .piston during: the reciprocation thereof; and a hmdl; exterior of *theeylinder opposite to it e is charge outlet to reciprocate the piston cluinnber connected thereto to osci lnteoni n n axiscentrally ofthe; cylinder anllfl parallel with the piston chamber, substen tiully hsand for the purpose specified.

9. In a syringe, thecombi'netion of a Cyl: inder haying a discharge outlet 1 at one end;

a pistonYchumber therein connected to" the mitlet'at one end; a piston; a piston rod ex:

tending exteriorlyyof theflpiston chamber flfland cylinderoppositeto the outlet; said 5 pistoneliumber pistonand piston rod being located in thel cylinder atone side of the longitudinal axis thereof and suction inlets to the piston chamber, comprising 3 tube extending longitudinally of the cylinderwith its,endsjlying arljacentthesides and at oppositeends thereofandConnected to the p181 j ton ehnmber to oscillate on an axiseentra lly "oftheeylinder and puralleln with the pistonqehamber, sub

stuntiull'y as and for the inatioirof 'cylnetely connectgthe tubeawith' the cylinder at ppositeendsof the piston, substantially as nanl fe the purpose specified. I 6; Inn a syringe, 1the$combinetion of a resin eryoir having anl g nethaving suction inlet's its its

10. In a syringe, the combination of episton chamber having suction intakes adjacent opposite ends; a piston to reciprocate in the chamber; a tube reciprocablewith the pis- 5 ton and slidably engaging in one end of the piston chamber; ports in said tube the opening and closing of which ports is controlled by'the piston; and a rod to recifprocate the piston and tube from the end 0 the piston opposite to the tube, said piston during the reciprocation thereof alternately connecting the inner end of the tube to the piston chamber at opposite sides of the piston. v

GEORGE T. PEARSONS. 

